Question 1

When an LRC series circuit is driven at resonance,which of the following statements about the circuit are correct? (There may be more than one correct choice.)

Accepted Answer

A) The impedance of the circuit is zero. 
B) The impedance of the circuit has its maximum value. 
C) The impedance of the circuit has its minimum value. 
D) The inductive reactance and the capacitive reactance are both zero. 
E) The inductive reactance and the capacitive reactance are exactly equal to each other. 
A) The impedance of the circuit is zero. 
B) The impedance of the circuit has its maximum value. 
C) The impedance of the circuit has its minimum value. 
D) The inductive reactance and the capacitive reactance are both zero. 
E) The inductive reactance and the capacitive reactance are exactly equal to each other.

Question 2

A series ac circuit consists of a voltage source of frequency 60 Hz and source voltage amplitude 345 volts,a   resistor,a   capacitor,and an inductor of inductance L.
(a)What must be the value of L for the phase angle to be zero?
(b)When L has the value calculated in part (a),what is the current amplitude in the circuit?

Accepted Answer

The answer of A series ac circuit consists of a...

Question 3

An LRC series circuit has voltage supplied to it at a frequency of 13.0 kHz with a phase difference between the current and the voltage of magnitude 0.20 rad.If the circuit has a capacitance of 5.0 μF and an inductance of 0.050 H find the resistance of the circuit.

Accepted Answer

A) 20 kΩ 
B) 0.99 kΩ 
C) 9.0 kΩ 
D) 0.32 kΩ 
A) 20 kΩ 
B) 0.99 kΩ 
C) 9.0 kΩ 
D) 0.32 kΩ

Question 4

A series circuit consists of a 50-Hz ac source,a 50-Ω resistor,a 0.50-H inductor,and a 60-μF capacitor.The rms current in the circuit is measured to be 3.1 A.What is the voltage amplitude of the source?

Accepted Answer

A) 510 V 
B) 270 V 
C) 220 V 
D) 180 V 
E) 160 V 
A) 510 V 
B) 270 V 
C) 220 V 
D) 180 V 
E) 160 V

Exam 32: Ac Circuits

When an LRC series circuit is driven at resonance,which of the following statements about the circuit are correct? (There may be more than one correct choice.)

An LRC series circuit has voltage supplied to it at a frequency of 13.0 kHz with a phase difference between the current and the voltage of magnitude 0.20 rad.If the circuit has a capacitance of 5.0 μF and an inductance of 0.050 H find the resistance of the circuit.

A series circuit consists of a 50-Hz ac source,a 50-Ω resistor,a 0.50-H inductor,and a 60-μF capacitor.The rms current in the circuit is measured to be 3.1 A.What is the voltage amplitude of the source?

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